package com.ruoyi.common.exception.component;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

@Configuration
@EnableAsync
public class SimpleCommonTaskExecutorConfig {
    private int corePoolSize = 4;//线程池维护线程的最少数量
    private int maxPoolSize = 8;//线程池维护线程的最大数量
    private int queueCapacity = 50; //缓存队列
    private int keepAlive = 600;//允许的空闲时间


    // 通用的一个线程池配置,适合简单场景使用,复杂的运算或者io,请单独开线程池使用
    @Bean("simpleCommonTaskExecutor")
    public Executor threadTaskExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(corePoolSize);
        executor.setMaxPoolSize(maxPoolSize);
        executor.setQueueCapacity(queueCapacity);
        executor.setThreadNamePrefix("simpleCommonTaskExecutor-");
        // rejection-policy：当pool已经达到max size的时候，如何处理新任务
        // CALLER_RUNS：不在新线程中执行任务，而是有调用者所在的线程来执行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy()); // 即提交任务的线程进行执行
        executor.setKeepAliveSeconds(keepAlive);
        executor.initialize();
        executor.setWaitForTasksToCompleteOnShutdown(true);// 等待所有任务结束后再关闭线程池
        return executor;
    }
}

